function calculateCompoundInterest(principal, rate, time, compoundsPerYear) {↵ const amount = principal * Math.pow((1 + rate / compoundsPerYear), compoundsPerYear * time);↵ const interest = amount - principal;↵ return { amount, interest, effectiveRate: (amount / principal - 1) * 100 };↵ }↵ ↵ class InvestmentPortfolio {↵ constructor(initialCapital) {↵ this.assets = [];↵ this.cash = initialCapital;↵ this.transactionHistory = [];↵ }↵ ↵ buyAsset(symbol, quantity, price) {↵ const totalCost = quantity * price;↵ if (this.cash >= totalCost) {↵ this.assets.push({ symbol, quantity, purchasePrice: price });↵ this.cash -= totalCost;↵ this.transactionHistory.push({ type: "BUY", symbol, quantity, price, timestamp: Date.now() });↵ return true;↵ }↵ return false;↵ }↵ }